DOI: 10.1007/s00531-014-1104-8
Scopus记录号: 2-s2.0-84925499102
论文题名: Detrital zircon geochronology in blueschist-facies meta-conglomerates from the Western Alps: implications for the late Carboniferous to early Permian palaeogeography
作者: Manzotti P. ; Poujol M. ; Ballèvre M.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2015
卷: 104, 期: 3 起始页码: 703
结束页码: 731
语种: 英语
英文关键词: Detrital zircon
; Gran Paradiso
; Money Unit
; Permo-Carboniferous evolution
英文摘要: In the Western Alps, the Money Complex of the Gran Paradiso Massif, metamorphosed under blueschist facies during the Alpine cycle, is considered to be Permo-Carboniferous in age, but no palaeontological or radiometric data constrain this interpretation. A revision of the lithostratigraphy of the Money Complex allows recognizing a polygenic (graphite-rich) and a monogenic (graphite-poor) meta-sedimentary formation. Detrital zircon U–Pb geochronology in both meta-sedimentary formations shows that (i) the main population is Cambrian and Ordovician in age, (ii) the youngest grains are Silurian and Lower Devonian, and (iii) Carboniferous zircon grains are lacking. A careful study of the age distributions in the Alps suggests that potential source for the detrital material in the Money Complex is the Briançonnais basement. Late Carboniferous magmatism is widespread in the Helvetic Zone of the Alps. Permian magmatism is dominant in the Briançonnais, the Austroalpine and the Southalpine basements. The lack of Carboniferous zircons in the Money Complex suggests that the detritus was not shed from the Helvetic zone, which was separated from the Money basin by the Zone Houillère basin, where the main drainage pattern was developed from south to north and where the depocenters migrated northwards from the Upper Missisippian to Upper Pennsylvanian. We suggest that the Money Complex may had been located to the east of the main river drainage inside the Zone Houillère basin or alternatively may represent a small basin, located on the east of the Zone Houillère. © 2014, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925499102&doi=10.1007%2fs00531-014-1104-8&partnerID=40&md5=dd4a630b5c65ad5737213cf2bba26151
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70308
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Géosciences Rennes, UMR-CNRS 6118, Université de Rennes 1, Campus de Beaulieu, Rennes Cedex, France
Recommended Citation:
Manzotti P.,Poujol M.,Ballèvre M.. Detrital zircon geochronology in blueschist-facies meta-conglomerates from the Western Alps: implications for the late Carboniferous to early Permian palaeogeography[J]. International Journal of Earth Sciences,2015-01-01,104(3)